The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-021-2708, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-021-2708 |
| Primary Part Number | 3278159 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Head Height | 0.386 INCHES MINIMUM AND 0.426 INCHES MAXIMUM IN |
| Fastener Length | 4.885 INCHES MINIMUM AND 4.915 INCHES MAXIMUM IN |
| Thread Length | 1.250 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN |
| Material Document and Classification | SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3278159 PRIMARY | Cummins Inc. (USA) |
| Reference | Meaning |
|---|---|
| 162182 | 5/9 Secondary reference Cummins Inc. |
NSN 5305-01-021-2708 is a Screw,cap,hexagon Head, manufactured by Cummins Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-021-2708 has 1 manufacturer part number on file: 3278159 (Cummins Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 2990-01-151-8939, 2930-01-154-7999. Verify interchangeability with system specifications before substitution.
Key specifications for 3278159: Head Height: 0.386 INCHES MINIMUM AND 0.426 INCHES MAXIMUM IN; Fastener Length: 4.885 INCHES MINIMUM AND 4.915 INCHES MAXIMUM IN; Thread Length: 1.250 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN; Material Document and Classification: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.